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Heat Shrink Terminations Systems |
(Single and triple core Power Cables up to 36 kV)
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Heat Shrink Terminations System upto 36kV |
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| Governing Standards: |
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| DIN VDE 0278/ CENELEC "POWER CABLE ACCESSORIES WITH RATED VOLTAGE UP TO 30 kV (Um = 36 kV)", IEEE 48-1990: HIGH VOLTAGE ALTERNATING - CURRENT CABLE TERMINATIONS. |
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| Type Testing |
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| Ikebana MV Termination system is type tested as per DIN VDE 0278/ CENELEC standards in independent recognized laboratories. The type test reports will be available on request. |
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| Parts of the Termination System |
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| 1. Heat Shrinkable non Tracking Tube : NTT ( Red ) |
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| Non tracking tube (red) is used as an external protective covering for the core for both indoor and outdoor applications. Properties of this tube are high insulation, non tracking, erosion resistance, weather proof and flame retardant. Minimum length of the non tracking tube depends on the system voltage and whether the application is indoor or outdoor. Please refer to the engineering drawing for details. |
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| 2. Heat Shrinkable Stress Control Tube: SCT ( Black ) |
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| Stress control tube (black) is used to control the high electrical stress present at the end of the semi-con screen of the cable. This tube has a combination of resistive and capacitive characteristics which, when applied to the end of the semi-con screen of the cable, give relief to the electrical stress by stress grading. The minimum lengths of the stress control tube necessary for effective stress control are 150 MM for 12 kV, 250 MM for 24 kV and 350 MM
for 36 kV. |
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| 3. Heat Shrinkable LUG Seal |
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| HV lug seal is made from the material same as the non tracking tube and is coated internally with the red sealant. Lug seal protects the interface between the termination lug and the cable core covered with the non tracking HV tube. |
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| 4. Heat Shrink MV Breakout |
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| MV breakouts are used to provide insulation, binding force and sealing over the crutch of three core cables at the branching point. They are coated internally with waterproof, non-tracking; butyl rubber based red sealant mastic. |
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| 5. Heat Shrink HV Sheds |
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| HV sheds are used to extend the creepage path. The properties of the HV Sheds are electrical insulation, non tracking, erosion resistance, weather proof and flame retardant. HV Sheds are internally coated with waterproof, non-tracking; butyl rubber based red sealant mastic. The minimum number of sheds designed to be used in the termination system depends on system voltage and whether the application is indoor or outdoor. Please refer to the engineering drawing. |
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| 6. Conductive Paint |
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| Conductive paint is applied around the step formed at the end of the semi-con screen and start of the XLPE insulation of the cable to render the air entrapped at the step discharge free. Please refer to the installation procedure. |
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| 7. Discharge Supression Compound |
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| Cuts and scratches on the XLPE insulation may cause electric discharge under the stress control tube. Application of a thin layer of silicone based discharge suppression compound will make it free of partial discharge. |
